The structure and catalytic properties of Rh‐doped CeO2 catalysts
The average structure and the local structure of nanocrystalline Rh-doped CeO2 catalysts, prepared using a co-precipitation method, were studied using a set of structural (PDF, HRTEM, XRD) and spectral (XPS, Raman spectroscopy) methods. The samples with Rh content less than 10 wt%, calcined at 450 °...
| Published in: | Physical chemistry chemical physics Vol. 19, № 47. P. 31883-31897 |
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| Other Authors: | , , , , , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001157865 Перейти в каталог НБ ТГУ |
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| 245 | 1 | 4 | |a The structure and catalytic properties of Rh‐doped CeO2 catalysts |c E. A. Derevyannikova, T. Yu. Kardash, L. S. Kibis [et al.] |
| 336 | |a Текст | ||
| 337 | |a электронный | ||
| 504 | |a Библиогр.: 74 назв. | ||
| 506 | |a Ограниченный доступ | ||
| 520 | 3 | |a The average structure and the local structure of nanocrystalline Rh-doped CeO2 catalysts, prepared using a co-precipitation method, were studied using a set of structural (PDF, HRTEM, XRD) and spectral (XPS, Raman spectroscopy) methods. The samples with Rh content less than 10 wt%, calcined at 450 °C, were homogeneous solid solutions. A comparison of the experimental results and Pair distribution function (PDF) modeling data showed that Rh3+ substitutes Ce4+ ions in the fluorite phase. Charge equilibrium is obtained by the oxygen vacancy for each Rh3+ cation introduced into the ceria cell. The solid solution demonstrated high catalytic activity in low-temperature CO oxidation (LTO CO). The solid solutions were stable only in a nanocrystalline state and decomposed upon thermal treatment. The calcination of the solid solution at T > 450 °C results in a decrease in the catalytic activity that is accompanied by Rh association in the subsurface area and strong distortion of the anionic subcell. At T = 800 °C α-Rh2O3 nanoparticles are formed on the surface of the fluorite phase. The XRD-detectable Rh oxide phases are formed after calcination at 1000 °C. However, some parts of Rh within the subsurface RhxCe1-xO2-δ solid solution remain and they preserve catalytic properties for low-temperature oxidation. © 2017 the Owner Societies. | |
| 653 | |a калитические свойства | ||
| 653 | |a структура | ||
| 653 | |a катализаторы, легированные родием | ||
| 655 | 4 | |a статьи в журналах | |
| 700 | 1 | |a Derevyannikova, Elizaveta A. |9 503282 | |
| 700 | 1 | |a Kardash, Tatyana Yu. |9 457067 | |
| 700 | 1 | |a Kibis, Lidiya S. |9 370874 | |
| 700 | 1 | |a Slavinskaya, Elena M. |9 138506 | |
| 700 | 1 | |a Svetlichnyi, Valerii A. |9 562988 | |
| 700 | 1 | |a Stonkus, Olga A . |9 138505 | |
| 700 | 1 | |a Ivanova, A. S. |9 989891 | |
| 700 | 1 | |a Boronin, Andrei I. |9 106573 | |
| 773 | 0 | |t Physical chemistry chemical physics |d 2017 |g Vol. 19, № 47. P. 31883-31897 |x 1463-9076 | |
| 852 | 4 | |a RU-ToGU | |
| 856 | 4 | |u https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001157865 | |
| 856 | |y Перейти в каталог НБ ТГУ |u https://koha.lib.tsu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=1157865 | ||
| 908 | |a статья | ||
| 999 | |c 1157865 |d 1157865 | ||
| 039 | |b 100 | ||